The 2015 Corvette Stingray can achieve up to 29 MPG on the highway thanks to the gearing of its all-new 8L90E eight-speed automatic transmission. As you may know, that transmission is also destined for use in the 2015 Corvette Z06, which will return equally as impressive highway fuel economy numbers for a 650 horsepower V8 supercar.
According to the U.S. Department of Energy, the 2015 Z06 will return 13 MPG in the city and 23 MPG on the highway for a combined rating of 16 MPG. Those figures are for eight-speed automatic Z06s only, as the figures for seven-speed models are not listed. We’re expecting either improvements of one MPG like seven-speed C7 Stingrays or identical returns with manual Z06s.
The Z06’s fuel economy is comparable to that of other powerful forced-induction V8 cars. The McLaren 650S Coupe’s 3.8-liter twin-turbo V8 and seven-speed dual clutch transmission result in 16 MPG city and 22 MPG highway for a combined rating of 18 MPG, which is only a small improvement over the Z06 considering the engine is smaller and turbocharged. For comparison’s sake, Dodge’s new eight-speed Challenger Hellcat will return 13 MPG city, 22 MPG highway and 16 MPG combined.
The 2015 Z06 benefits from several fuel-saving technologies also implemented on standard C7 Corvette Stingrays including direct injection, Active Fuel Management and continuously variable valve timing. Crucial to its efficiency is Active Fuel Management, which allows it to run as either a four-cylinder with no boost, a V8 with no boost, or a V8 with boost, depending on the levels of performance required at any given time.